Method of making metal boxes



April 1933. R. v. BURDICK Y 1,904,778

METHOD OF MAKING METAL BOXES Filed Oct. 28, 1929 51616 $1310 1 5*}11 14 v a J .712 We refol- Patented Apr. 18, 1933 UNITE- STATES RALPH v. nunnircxjonnnnnn vf, NEW xoRK f METHOD or MAKING Boxes 1 Application filed October 2s,"ie'za iseiialiNo. 403,035.

My invention provides a new and im roved. method of forming a sheet metal box rom aparting from the spirit or scope of the in-j vention.

These and other objects will appear from the following specification when read in connectlon w1th the accompanying drawlng, and wherem:

Figure 1 is a plan view of the box with the cover removed.

Figure 2 is a view taken at a right angl to Figure 1.

Figure 3 is a sectional view on line 33 of V Figure 1.

Figure 4 is a fragmentary sectional view on line H of Figure 2, showing by dotted lines one of the bendable ears before it is bent against the adjacent wall of the box.

' Figure 5 is a perspective view of the finished product.

Figure 6 is a View showing one of the steps in the method of formingthe box.

Figure 7 is a view of theblank from which the box is formed.

' Figure 8 is a similar view of the blank from which the cover is formed.

The blank from which the box is formed is preferably of the construction illustrated in Figure 7, and includes a relatively wide portion 10 and a relatively narrow portion .11.

The blank is stamped to provide eachof said portions with bendable ears and correspondingly shaped depressions, the ears and de pressions of the portion 10 being indicated at 12 and 13 respectively, while the corresponding features of the portion 11 are indicated at 14 and 15 respectively. It will be-observed that the ears normally project from the opposed longitudinal edges of their respective which is equal in width to the central vor'inportionswith the ears'of eachportionsodisi.

posed with-relation to the depressions, that afterthe blank. has been formed'intoa box, in j a manner ,to be presently described, the ears -of one portion are bent at rightianglesthereto, and :into theadjacent depressions "of the other portion, lying flush with outer-surfaces -of the adjacent walls of the box However,

'by providing certain wallsfoffthe box with the depressions above mentioned each wall so 9 1 characterized is consequently formed with-a ;r-i'b or bead 16, the latterlyinglwithin the box, and located at'points to afford the box in its entirety the desired strength ancl rigidity.

HGreJ-it is'desiredtobe stated that-a box. of F any particular size can be provided withany" number ,ofears and depressions, located at. themostadvantage'ous "pointsfor'the purposes intended, and manifestly the number and lo- ;c'a'tion -of' such ears and depressions will vary, 1 depending of course upon the size" andron templated use of the box so formed i 1 Inthe'formation of thebox, theportion 10 isbent along spaced parallel lines 17; to'provide right-singularly disposed side walls 18, V the central or intermediate portion 10 constituting of course one of the body walls of the box. The relatively narrow portion 11,

termediate portion 10 justlreferred to, constitutes the other opposedbody wall of the box, and ithis portion 11rlS bent along spaced transverse lines 19 to form the end wall 20. As clearly illustrated in Figure 6, after the portion 11 has been bent to provide the end Wall 20, the portion 11 is then brought into engagement with the edges of the side walls 18. If desired the edges of the blank can be. slightly beveled as at 21,so that incident to the formationof the box, the walls 11 and 201 will properly and effectively engage the adjacent edges of the side walls 11. The final operationin the completion of the-body-of thebox, resides in bending the ears 12 carried by the side walls 11 over and into thedepres- '9 "tively clamped together, with the bendable ears lying flush with the outer surfacesof the box. v i It will also be noted from an inspection of Figure 7 vthat the opposed ends of the blank are slightly reduced as at 22, thereby providing the box with a neok-likeportion' to slid- 7 ably accommodate thecover 23,, and also de- The relatively wide portion 250i this b15111; is bent along spaced parallel lines 26 to pro 7 fine-a shoulder 24 to .limit'the movement of the cover upon the box.

In Figure 8 I have illustrated' th'e. blank from which the cover is formed, and both the H construction and method of forming the coverv is substantially similar to that of the body of the box.

' vide th'enside walls of the cover, while the "cover. Both portions 25and 27 of the blank "reduced portion 27 of the blank is folded upon spaced transverse lines 28 to form the end wall 29, and the other opposed wall of the are-formed With bendableears and depressions 30; and 31'respectively, and, inthe final operation, the ears of one portion are bent at right angles thereto and into the depressionsotthe other portion to complete the covern vWhat is olaimedisi f The. method of forming a sheet metal box, comprising, stamping a blank with two parts,

each having securing ears thereon and receiv- 1ng depressions therein along correspondlng edges, bending a substantial portion of one part of the blank at either side at right angles thereto to form three sides of the box, benda ing the blank medially upon two parallel lines to form the bottom and the remaining side v 1 'ofthe box from the other part of the blank,

and finally securing the bent side portions of the first-named part and the side-forming portion of the second-named part together by bending the seouringears of each part of the blank into the receiving depressions other part thereof. I t

In testimony whereof I aifix mysignature. a RALPH V. BURDIOK.

of the 

